300
K. Giridharan et al.
Table 4 Mechanical properties of the welded samples
Sample No
Rotational
speed (rpm)
Welding
speed
(mm/min)
Axial load
(kN)
Yield
strength
(Mpa)
Ultimate
tensile
strength
(Mpa)
Hardness
1
1000
20
2
130
148
114
2
1300
40
2
52
69
112.67
3
1000
60
2
56
67
120.33
4
1500
40
2
43
159
111.67
5
1300
60
2
163
181
131.67
6
1000
20
2
115
131
141.67
7
1500
60
2
82
87
100.67
8
1300
20
2
60
68
112.33
9
1500
40
2
52
61
112.67
148
69
67
159
181
131
87
68
59
0
50
100
150
200
0
2
4
6
8
1 0
ULTIMATE
TENSILE
STRENGTH (MPa)
SPECIMEN
Fig. 4 Graphical representation of the tensile test in each weld joints
3.2 Hardness Test
The hardness is tested by using Vickers hardness tester under an Hv100gm loading
condition and the rest period is 10 s. The hardness value of each weld samples is
listed in Table 4. The extreme hardness value 141.67 is obtained at the weld zone
from the straight cylindrical tool in the process parameters are 1000 rpm and the
feed is 20 mm/min since both the welding speed and tool travel speed is in minimum
operating conditions. The graphical representation of the hardness survey in each
weld samples as shown in Fig. 5.